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March 10, 1964 APP Filed Sept. 5. 1961 D. E. HUFFMAN ETAL PRIvATE LINE NETwoRK oF AIRLINE "x" 51 Sheets-Sheet 1 FIG. l

INTERCHANGE INTERcHANGE To FROM AIRLINE x AIRLINE x PRIVATE LINE NETwoRK '4 0F AIRLINE "Y" Y INTERGHANGE INTERGIIANGE To I-'RoM oRIGINATING STATION I AIRLINE Y AIRLINE` Y TK GP TERMINATING PRI sTATIoN TK GP TERMINAT'NG #5 sTATIoN f T -1 I/ I I IsELEcTIvEI f I4 CALLING I gsELEcTIvE; IREGEIVING i I CALLING I 1 sTATIoN I IEaNIJ` I I "I---J I REcEIvE i r---I---nH-TI "-r- I y l TRANsLAToR 2 I I MIscELLANEous I I TERMINATING I REGENERAToR I I 1 sTATIoN I I I 1 INTERGEPT I Il I I i sELEoTIvE .II i ACCESS To l l I CALL'NG I I sELEcTIvE Il I RECEIVING I CAL-UNG I sTATIoN l NETwoRK i I I I I J l I l I I. L I

ATTORNEY March 10, 1964 D. E. HUFFMAN ETAL 3,124,643

APPARATUS FOR AUTOMATICALLY EFFECTING LINE swITcHING oF TELEGRAPH MESSAGES 31 Sheets-Sheet 2 Filed Sept. 5. -1961 ATTOR NEY March 10, 1964 SWITCHING OF TELEGRAPH MESSAGES 31 Sheets-Sheet 3 Filed Sept. 5. 1961 N. msm o, u mm L, L/ R U mHUE NDP O EE.J 000 o 0000 000 00000 I.LRE 0000 0000 0 0 000 0. 0000.0 OOOO OO OO O OO OEA COGOOOOOOOOOOOOOOO0O 000000000.000000000000 000000 0000. 0 0 0 0 o 0 00o 00 0 o 0 0 0 00000 0 0 zzzzmmmmmmv +ml mv| oo. ^..-m zmv 020mm: otmF v N .EFE m m22 zocbmzzou z non, E02 o m L 0000000000/.A 0000000000 0 o 000 000 0 0 000.0 00 00.0 000 000000 0 000 00 v 0 0 o 000 0 00 0 00 00 0 00 00 0 0 0 0 000 o 0 0 .OOOOOOOOOOOOOOOOOOO0.00000000.000000000000-00C0 0 00 0 00 00000 0 000000 00 000000 0 0 00,00 0 00 00o `0 0 0 0 0 0000 0 0 00000000000 00000000000. ^..Q00J Qwm-.mm- N+^. ooo 0. mwmmm N+mv ATTORNEY March 10, 1964 D. E. HUFFMAN ETAL 3,124,543

APPARATUS FOR AUTOMATICALLY EFFECTING LINE swITcHING oF TELEGRAPH MESSAGES 31 Sheets-Sheet 4 Filed Sept. 5, 1961 hv. mi

INVENTORS DONALD E. HUFFMAN PETER P. PETROS WALTER J. ZENNER ATTORNEY D. E. HUFFMAN ETAL. 3,124,643

March 10, 1964 APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING OF TELEGRAPH MESSAGES 31 Sheets-Sheet 5 Filed Sept. 5, 1961 FIG. 4

' lllllllilllllllllllllll' INVENTORS DONALD E. HUFFMAN `PETER E PETROS WALTER J. ZENNER ATTORNEY FIG. 7

March 10, 1964 D. E. HUFFMAN ETAL 3,124,643 APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING 0F TELEGRAPH MESSAGES 31 Sheets-Sheet 6 Filed Sept. 5, 1961 OON ATTORNEY March 10, 1964 A D. E. HUFFMAN ETAL 3,124,643

APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING 0F TELEGRAPH MESSAGES Filed Sept. 5, 1961 31 Sheets-Sheet 7 355 FIG. Il

f 380 Q f INVENToRs l f DONALD E. HUFFMAN 38, PETER vP. PETRos 376 o. oo oo o WALTER J, ZENNER o ooo o WML o o oo oo` BY '45 ATToRNgY March 10, 1964 D. E. HUFFMAN ETAL 3,124,643

APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING 0F TELEGRAPH MESSAGES 3l Sheets-Sheet 8 Filed Sept. 5, 1961 INVENTORS DONALD E. HUFFMAN PETER P. PETROS WALTER J. ZENNER ATTORNEY March 10, 1964 D.E.HUFFMAN ETAL APPARATUS FOR AUTOMATICALLY EFFECTING LINE Filed Sept. 5, 1961 TTS SWITCHING OF TELEGRAPH MESSAGES FIG.I4

31 Sheets-Sheet 9 INVENTORS DONALD E.HUFFMAN PETER R PETROS WAETER ZENNER A TToRNEY March 10, 1964 D. E. HUFFMAN ETAL 3,124,543

APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING OF TELEGRAPH MESSAGES 51 Sheets-Sheet 10 Filed Sept. 5. 1961 QNALaNNJSMAN D PETER P. PETROS WALTER J. ZENNER ATTORNEY March 10, 1964 D. E. HUFFMAN ETAL APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING OF TELEGRAPH MESSAGES Filed Sept. 5, 1961 31 SheetsfSheet 11" ALL Ll'4 @2R To o-lg FIG. 26

2 sMR Tc 2e 6-21 EMR 4 O- FIG. 25 sEss 2 x- EMR SES ARC 3 EMR SESS 4 *c* 48V.D.C.

0N* ALL 5-23 NTER 5.5-3- 1 I 'lo 'I 2 SMR X ll-5,22 ,23 |O 'I 24 25 EMR X z I2 59M EMR KEY EOM sEss I KEY ARC I sMRxs 5x EMR ALL I-22,26

'5 23,25 FIG. I9

Mos s.o.M. a EOM. maas J coNTRoL cIRcuIT Y I sEss SELECTOR ARcs cIRcuIT I 2o ALL OTB 2| ARC? I,4,a,s,Io c ALL OTCIB ARC e I l I,2,4,s,sII,Ie-2I I ALL T630 ARC 9 FIG. 24 I,4,s,Io,I8-2I I ALL 01,029 ARcIo I,s,4,7.-Io,I2,I/ r w ALL To 28 ARc II I,4,s,|o ALL cm2.,

ARc I2 2o LALL INvI-:NToRs m23, ooNALoE. HuFr-MAN I '5 PETER P. PETROS WALTER J. ZENNER lBY mi ATTORNEY March Filed Sept. 5, 1961 E.O.A. WITH IDENTIFICATION CONTROL CIRCUIT EASS TC|9 TC 26 FIG. 26 A 10, 1964 D. E. HUFFMAN ETAL APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING OF TELEGRAPH MESSAGES 51 Sheets-Sheet 12 TB I I TB 2 TB 3 T84 TB 5 l #I PUNCH UNITS MINUTES FIG. 2l

TIMER Tae TB? Ta a Ine. 2s TB 9 Telo FIG. 2-2 Fla 2e F|G.25

ARC 4 EAR 2 EAR 4 EAss INTER. EASS EOA EAR MD 9 KEY INvENToRs- WALTER J. ZENNER ATTORNEY March 10, 1964 SWITCHING 0F TELEGRAPI-I MESSAGES ATTORNEY March 10, 1964 D. E. HUFFMAN ETAL 3,124,643

APPARATUS Foa AUTOMATICALLY EFFECTING LINE SWITCHING OF TELEGRAPH MESSAGES Filed Sept. 5, 1961 31 Sheets-Sheet 14 March 10, 1964 D. E. HUFFMAN ETAL 3,124,643

APPARATUS FOR AUTOMATICALLY EFFECTING LINE SWITCHING 0F TELEGRAFH MESSAGES Filed Sept. 5, 1961 31 Sheets-Sheet 15 CCDMAT ARM uP CMR -4av.D.C.

| CoAu A F|Cs.|9,22,2s m9 Fles. 24,25

CMR BRR Rs'R R| RuMAC.

ECKEY ConoMAT EAR sMR EMR gDN. DAR CCR LAR PMR l FIGS@ 2O l l I l Y s 1 7 e s x e e e 22s M09 22,28

nale,

H630 H624 T329 RU. COD

DAR CCR LAR PMR RER Aulx.m R2 MA@ Coon CCDR RsR RsR i RESET LI --8 MAF BRR

l CoDoMAT CMR x6 D I coDoMAT sENslNG --4 No CARD CoNTACTs T023 x 3% f *w CMR CoD2 F ...N

^I TC27 I f u l "o2 RsRx2 MRR A 3 Tc29 L N-M F1624 ^5 TCla FIG. 26 v J A CoDoMAT a PUNCH 6 TB2I CoNTRoL CIRCUIT v n n INVENTORS DONALD E. HUFFMAN PETER P. PETROS WALTER J. ZENNER ATTORNEY March l0, 1964 D. E. vHUFFMAN ETAL 3,124,643

APPARATUS FOR AUTOMATICALLY EFFECTING LINE swITcHING oF TELEGRAPH MESSAGES 31 Sheets-Sheet 16 Filed Sept. 5, 1961 March l0, 1964 D. E. HUFFMAN ETAL 3,124,643

APPARATUS FOR AUTOMATICALLY EFFECTING LINE lSWITCHING 0F TELEGRAPH MESSAGES 31 Sheets-Sheet l? Filed Sept.v 5, 1961 l RSA LUR

RSA

Fie. 2e

RECOGNITION RELAY CIRCUIT Rea A RSX RECOGNITION. RELAY F'G- 29 olculr (ALARM) HG. 27 INVENTORS TH34 TG3! DONALD E. HUFFMAN PETER R PETROS WALTER d. ZENNER ATTORNEY March 10, 1964 D. E. HUFFMAN ETAL 3,124,543 APPARATUS FOR AUTOMATICALLY EFFECTING LINE l SWITCHING OF TELEGRAPH MESSAGES Flled Sept. 5, 1961 31 Sheets-Sheet 18 FIG. 50

RUN OUT MAGNET CIRCUIT ROM FIG. 32

STOP RUN SWITCH CIRCUIT SRR STOP-RUN 48V TIGHT x'rPE sw.

I I mvENToRs DONALD E. HUFFMAN A PETER P. PETROS WALTER J. ZENNER avm ATTORNEY March 10, 1964 D E H UFFMAN 3124 4 APPARATUS FCR AUTCMATICALLY EFTING LINE 6 3 swITCHINC oF TELECRAPR MESSAGES Flled Sept. 5, 1961 31 Sheets-Sheet 20 TOHR ONHR 9 FIC. 4aTH'2 x3 PNR 5 :e TCHR p2 POIGR TOI-IR TOIRA XIZ '4 "|2 '5 DM TK|| y FIG' 3| TCHR ToHA 7 l r D2 f FIC. 2T 38 #i PEISR TsR ,l2 OH 7 SRL 34 TO`|"|R SAILA SIR Bg'l TRANSMITTER "l '9 g 8 48 V oFF HooK CIRCUIT A l OVH l he. 3e m38 Cso TNTERCEPT |N|T|AT|CN t FIG' 27 H W CIRCUIT I RES PSR ITRB lTRB l- .9 'lo l-NSS .PH-@ 48v 0N u 5 6 4 TK'a ITRB ITRA LNss ARCS i I i TJ 4o TRR ALLA 2 lIO Y 1 M0200 x8 CFR ITRCX 'TRC Mozol 2 JSRx H657 I Nss ARC4 :a

|=|C.ss SALA Au. e W58 Tol-R IALR HG2? IALR l Res x4 me. 44 l 'DSR F|C.3s, -F

I INVENToRs DONALD E. HUFFMAN PETER P. PETROS WALTER J. ZENNER BY ATTORNEY 

1. IN A PRINTING TELEGRAPH LINE SWITCHING MESSAGE TRANSMISSION SYSTEM, MEANS OPERABLE UNDER CONTROL OF A TAPE FOR ATTEMPTING TO COMPLETE A CONNECTION TO A STATION THE ADDRESS OF WHICH IS PERFORATED IN PERMUTATION CODE IN THE TAPE, MEANS FOR DETECTING THE SUCCESS OR FAILURE OF SUCH ATTEMPT, MEANS RENDERED EFFECTIVE BY THE DETECTION OF THE SUCCESS OF SUCH ATTEMPT FOR TRANSMITTING A MESSAGE TEXT UNDER CONTROL OF THE TAPE TO THE STATION THE ADDRESS OF WHICH IS IN THE TAPE, AND MEANS OPERABLE UNDER CONTROL OF THE DETECTING MEANS UPON THE FAILURE OF SUCH ATTEMPT TO INITIATE AT LEAST ONE MORE ATTEMPT TO COMPLETE THE CONNECTION. 